lfunc.c
资源名称:wow.rar [点击查看]
上传用户:jxpjxmjjw
上传日期:2009-12-07
资源大小:5877k
文件大小:3k
源码类别:
模拟服务器
开发平台:
Visual C++
- /*
- ** $Id: lfunc.c,v 1.1 2004/08/20 02:26:56 JH Exp $
- ** Auxiliary functions to manipulate prototypes and closures
- ** See Copyright Notice in lua.h
- */
- #include <stdlib.h>
- #define lfunc_c
- #include "lua.h"
- #include "lfunc.h"
- #include "lgc.h"
- #include "lmem.h"
- #include "lobject.h"
- #include "lstate.h"
- #define sizeCclosure(n) (cast(int, sizeof(CClosure)) +
- cast(int, sizeof(TObject)*((n)-1)))
- #define sizeLclosure(n) (cast(int, sizeof(LClosure)) +
- cast(int, sizeof(TObject *)*((n)-1)))
- Closure *luaF_newCclosure (lua_State *L, int nelems) {
- Closure *c = cast(Closure *, luaM_malloc(L, sizeCclosure(nelems)));
- luaC_link(L, valtogco(c), LUA_TFUNCTION);
- c->c.isC = 1;
- c->c.nupvalues = cast(lu_byte, nelems);
- return c;
- }
- Closure *luaF_newLclosure (lua_State *L, int nelems, TObject *e) {
- Closure *c = cast(Closure *, luaM_malloc(L, sizeLclosure(nelems)));
- luaC_link(L, valtogco(c), LUA_TFUNCTION);
- c->l.isC = 0;
- c->l.g = *e;
- c->l.nupvalues = cast(lu_byte, nelems);
- return c;
- }
- UpVal *luaF_findupval (lua_State *L, StkId level) {
- GCObject **pp = &L->openupval;
- UpVal *p;
- UpVal *v;
- while ((p = ngcotouv(*pp)) != NULL && p->v >= level) {
- if (p->v == level) return p;
- pp = &p->next;
- }
- v = luaM_new(L, UpVal); /* not found: create a new one */
- v->tt = LUA_TUPVAL;
- v->marked = 1; /* open upvalues should not be collected */
- v->v = level; /* current value lives in the stack */
- v->next = *pp; /* chain it in the proper position */
- *pp = valtogco(v);
- return v;
- }
- void luaF_close (lua_State *L, StkId level) {
- UpVal *p;
- while ((p = ngcotouv(L->openupval)) != NULL && p->v >= level) {
- setobj(&p->value, p->v); /* save current value (write barrier) */
- p->v = &p->value; /* now current value lives here */
- L->openupval = p->next; /* remove from `open' list */
- luaC_link(L, valtogco(p), LUA_TUPVAL);
- }
- }
- Proto *luaF_newproto (lua_State *L) {
- Proto *f = luaM_new(L, Proto);
- luaC_link(L, valtogco(f), LUA_TPROTO);
- f->k = NULL;
- f->sizek = 0;
- f->p = NULL;
- f->sizep = 0;
- f->code = NULL;
- f->sizecode = 0;
- f->sizelineinfo = 0;
- f->sizeupvalues = 0;
- f->nups = 0;
- f->upvalues = NULL;
- f->numparams = 0;
- f->is_vararg = 0;
- f->maxstacksize = 0;
- f->lineinfo = NULL;
- f->sizelocvars = 0;
- f->locvars = NULL;
- f->lineDefined = 0;
- f->source = NULL;
- return f;
- }
- void luaF_freeproto (lua_State *L, Proto *f) {
- luaM_freearray(L, f->code, f->sizecode, Instruction);
- luaM_freearray(L, f->p, f->sizep, Proto *);
- luaM_freearray(L, f->k, f->sizek, TObject);
- luaM_freearray(L, f->lineinfo, f->sizelineinfo, int);
- luaM_freearray(L, f->locvars, f->sizelocvars, struct LocVar);
- luaM_freearray(L, f->upvalues, f->sizeupvalues, TString *);
- luaM_freelem(L, f);
- }
- void luaF_freeclosure (lua_State *L, Closure *c) {
- int size = (c->c.isC) ? sizeCclosure(c->c.nupvalues) :
- sizeLclosure(c->l.nupvalues);
- luaM_free(L, c, size);
- }
- /*
- ** Look for n-th local variable at line `line' in function `func'.
- ** Returns NULL if not found.
- */
- const char *luaF_getlocalname (const Proto *f, int local_number, int pc) {
- int i;
- for (i = 0; i<f->sizelocvars && f->locvars[i].startpc <= pc; i++) {
- if (pc < f->locvars[i].endpc) { /* is variable active? */
- local_number--;
- if (local_number == 0)
- return getstr(f->locvars[i].varname);
- }
- }
- return NULL; /* not found */
- }